I learned a valuable lesson about the state of the Internet throughout the rest of the world. Many of us are fortunate to live in high bandwidth regions, but there are still large portions of the world that do not. By keeping your client side code small and lightweight, you can literally open your product up to new markets.
Excellent article: http://blog.chriszacharias.com/page-weight-matters
During Piwik 3.0.0 development cycle, maybe we can take a look at the state of our client side application and see whether we can reduce some of the data being transferred to load the Piwik dashboard.